Enzymes can catalyze a reaction only if
a. they encounter a molecule of ATP.
b. their active site is sufficiently oxidized.
c. they have both products in their active site at the same time.
d. they encounter a substrate that fits their active site.
Ans: d. they encounter a substrate that fits their active site.
You might also like to view...
In vertebrates, DNA methylation - the addition of a methyl group to DNA nucleotides - ensures that
A. the gene functions without interruption. B. no errors will be made during transcription. C. the nucleosome will quickly form, which assists in mRNA formation. D. once that gene is transcribed, the mRNA is saved and used over and over again. E. once a gene is turned off, it will remain off.
The period of time between exposure to an agent and the onset of disease signs and symptoms is called the
A. prodromal phase. B. decline phase. C. incubation period. D. lag phase.
Which digestive structures in humans secrete amylase?
a. liver and gallbladder b. liver and pancreas c. pancreas and gallbladder d. pancreas and salivary glands e. pancreas, liver, and salivary glands
Mature red blood cells
a. can live for about a year b. are the largest cells in the blood c. promote clotting d. carbonic acid